Variable magnification optical system, optical apparatus, and method for producing variable magnification optical system

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12235423
APP PUB NO 20240061221A1
SERIAL NO

18375375

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Abstract

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A variable magnification optical system that comprises a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group, and a rear lens group having at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object. The variable magnification optical system is constructed such that, upon varying a magnification from a wide angle end state to a telephoto end state, the first lens group is moved along the optical axis, a distance between the first lens group and the first intermediate lens group is varied, a distance between the first intermediate lens group and the second intermediate lens group is varied, a distance between the second intermediate lens group and the rear lens group is varied, and predetermined conditional expressions are satisfied.

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Patent Owner(s)

  • NIKON CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Machida, Kosuke Tokyo, JP 64 76

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